Form-roller.



H. A. W. WOOD.

FORM ROLLER.

APPLICATION FILED DECIU, I910. RENEWED MAR. I4. 1917- 1,251,158. IPatented Dec. 5,191

727mm W756i 7%. a. vhf/aw $6? M s UNITED STATES PATENT OFFICE.

HENRY A. WISE WOOD, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS,TO

WOOD NEWSPAPER MACHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORA-TION OF VIRGINIA.

FORM-ROLLER.

Patented Dec. 25, 1917.

Application filed December 17, 1910, Serial No. 597,891. Renewed March14, 1917. Serial No. 154,872.

To all whom it may concern:

Be it known that I, HENRY A. WISE WOOD, a citizen of the United States,resida new and useful F orm-Roller, of which the following is aspecification.

This invention relates to form inking rollers.

The principal objects of the invention are to provide a constructionthereof which will be more durable than the present form rollers,especially when used on high speed machines, and yet will be capable ofinking printing forms of all kinds; even when operated at a very highspeed, and also to provide a construction in which the interior of theroll can be cooled or heated if desired. Further objects and advantagesof the invention will appear hereinafter.

Reference is to be had to the accompanying drawing, in which- Figure 1is a longitudinal central sectional View of a portion of a form inkingroller constructed in accordance with this invention, and

Fig. 2 is a partial sectional View of the same on the line 22 of Fig. 1.

As is well understood, form inking rollers are now composed of a coreand a shell thereon of printers composition, usually composed of glue,molasses and glycerin, or other ingredients of a similar nature. Theseform rollers for news aper presses are usually'six inches in diameterand the shell of composition is about three-quarters of an inch thick,being of a uniform mixture throughout. It is cast upon the core at asingle operation. As the printing forms to which the form inking rollerconveys the ink from a metal supply roller or plate are extremelydelicate, it is necessary that the surface of the form roller besufficiently soft to avoid damaging the form, and 1t must be elastic inorder that it may reach and apply ink to the various heights of theform. Forms, as is Well known, are made up of linotype matter, or typeand cuts in such a way that the surface of the various parts are seldom,if ever, uniform in height. Therefore the elasticity and softness areabsolutely necessary requirements.

Printers composition, which has been found to be the most suitablesubstance for this purpose melts at a comparatively low 1ng at New York,in the county of New York and State of New York, have inventedtemperature and on account of its glycerin, becomes soft and mushy in amoist atmosphere. Therefore when a high degree of heat and moisture arepresent trouble always results 1n newspaper printing ofiices from theburstingof the form rollers. The faster a press is run the more quicklydo the form rollers heat and burst. This fact threatens with failure theattempts which are now bemg made to produce printing machines of greaterspeed. So far as I am aware, the only attempt that has been made tolessen this ditficulty is to make thedistributing rollers, where theyare concerned, of as hard printers composition as is' possible, whilethe form rollers still must be made of soft cgrlnposition in order to besufficiently. plia e.

The purpose of this invention is to provide a form roller which Withoutreducing the usual thickness of its composition shell shall neverthelessbe so made that upon the core it shall have a base of composition ofsuflicient hardness to withstand the above mentioned difliculties evenwhen the presses are run at a much higher speed than is now usual, andyet shall have necessary softness and elasticity at its surface. Inorder to accomplish this I provide a core A which may be of any usualform, such as a pipe, or shaft, or a shaft covered with wood, but in thepresent case it may be somewhat modified as Will be explainedhereinafter.

Upon this core is cast a homogenous shell or layer B of printerscomposition made in the usual way,-except that. it contains a largerproportion of its harder ingredients such as glue, and a smallerproportion of the others, as molasses and glycerin, for example, so thatit is considerably harder than any shell that is used at the presenttime for this purpose, being practically as hard as the shells of thedistributing rollers mentioned above. When this shell has become set anexternal layer or shell C of relatively soft homogeneous printerscomposition is cast upon it, this layer being of th usual composition soas to have all the necessary softness and elasticity. Each of theselayers is cylindrical and extends substantially the whole length of thecore as indicated in the drawing. If desired the outer layer can be caston the inner layer while it is still warm, so that the two layers willform a homogeneous union at their meeting surfaces. This'causes them tocohere, so that neither layer can burst unless the whole shell becomesway it will be seen that on account of the high melting point of theinner shell, the trouble from the bursting of the printing rolls isreduced to a minimum as t 1e outer shell cannot burst independently ofthe inner one, and that will standmuch more severe use and much highertemperature than the outer shell or any shell now in use.

The relative thickness of the two shells may be varied within certainlimits, but for ordinary uses I prefer to have the inner shell abouttwice as thick as the outer shell, that is, about one-half inch, whilethe outer shell is about one-quarter of an inch. This materially reducesthe thickness, and thus the weight of the more sensitive composition, sothat its tendency to lose its shape or to burst is brought down to aminimum. In cases where the machine is to operate at a very high speedthe thickness of the outer soft composition is still further reduced andin extreme cases brought down to a mere kin.

Another feature of the invention is the making of the core A hollow, byproviding it with an interior air-tight chamber a and providing itsjournals a with passages a therethrough, one for the introduction of acooling fluid, and the other for its discharge.

disrupted. In this This assists materially in accomplishing the otherobJects of the inventionspecified above, as by this means the interiorof the core can be cooled, and thus the temperatur of the compositionshell reduced. If desired this construction of the core can be utilizedfor the purpose of introducing steam and the like for heating the core,but I prefer to introduce air or water for the purpose of cooling it.

As has been stated this hollow construction can be used either forheating or cooling the roll. When used for heating the roll it resultsin softening up the ink when the machine starts so that it can bestarted much more rapidly and with the expenditure of less power. As theinterior of the roll is much harder than has been the case heretofore,this heating can be carried on to a higher degree than could have beenthe case with the ordinary form rollers, which are of the same hardnessthroughout.

While I have illustrated and described a preferred embodiment of theinvention, I am aware that many modifications can be made therein by anyperson skilled in the art Without departing from the scope of theinvention as expressed in the claims. Therefore, I do not wish to belimited to all the details of construction herein shown and described,but what I do claim is 1. As an article of manufacture, a form inkingroller comprising a c lindrical core, a cylindrical homogeneous layer ofroller composition containing a material to render it soft and arelatively large proportion of a material to render it hard, andsurrounding the core from end to end, and of substantially uniformthickness throughout, and a distinct outside cylindrical homogeneouslayer of the roller composition containing a relatively large proportionof the material for the purpose of making it soft, cohering to the firstnamed cylindrical layer and surrounding the same from end to end.

2. As an article of manufacture, a form inking roller comprising ahollow cylindrical core having a large chamber inside for retaining alarge amount of fluid, and means for the introduction of a fluid, acylindrical layer of relatively hard printers composition surroundingthe same, and an outside 0 lindrical layer of printers composition ofrelatively soft character on the hard composition and surrounding thesame, the inner layer of composition being not less than twice as thickas the outside one.-

In testimony whereof I have hereunto set my hand, in the presence of twosubscribing HENRY A. WISE WOOD.

Witnesses:

Maser. M. Gmssur, BLODWEN Jonas.

. witnesses.

